/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraParameterDefinitionsSubscriberViewModel.h
Find all parameters owned by the object viewed by theINiagaraParameterDefinitionsSubscriberViewModeland mark them as synchronizing with the target Parameter Definitions, then synchronize them.
void SubscribeAllParametersToDefinitions ( const [FGuid](API\Runtime\Core\Misc\FGuid) & DefinitionsUniqueId )